(CBS) – McDonald’s requires workers and customers to return to wearing masks in most of its restaurants in the United States, whether or not they have been vaccinated.

The fast food chain with more than 14,000 locations across the country follows new guidelines from the Centers for Disease Control. People in areas with significant or high levels of COVID transmission should wear masks because of the highly contagious Delta variant, the CDC says.

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CBS News reports that approximately 80% of the counties in the US have significant or high broadcast. In Massachusetts, the CDC says that every county except Franklin and Hampshire has significant or high transmission.

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McDonald’s has been asking for masks for employees and customers since last summer, but like many other companies, the COVID cases left in May due to vaccinations.

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Target announced this week that it would reintroduce the mask requirement for employees in areas with significant or high transmission rates.

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